Class 10th Science Chapter 6 – Control and Coordination | Human Brain – Structure and Functions

🧠 Control and Coordination

Human Brain – Structure and Functions | Class 10 Science | CBSE + Foundation + Competitive

🧠 Human Brain – Structure and Functions

1. Human Brain – मानव मस्तिष्क

Brain: The brain is the main control centre of the human nervous system. It receives information from sense organs, processes it and coordinates appropriate responses.

मस्तिष्क: मानव तंत्रिका तंत्र का मुख्य नियंत्रण केन्द्र मस्तिष्क है। यह इन्द्रिय अंगों से प्राप्त सूचनाओं को ग्रहण करता है, उनका विश्लेषण करता है और उचित प्रतिक्रिया का समन्वय करता है।

The brain is protected by the skull (cranium) and surrounded by protective membranes called meninges. It is also cushioned by cerebrospinal fluid (CSF).

2. Major Divisions of the Human Brain

At the Class 10 level, the brain is commonly discussed in three major regions:

1. Forebrain – अग्र मस्तिष्क
Mainly associated with thinking, memory, reasoning, sensory interpretation and voluntary actions.

2. Midbrain – मध्य मस्तिष्क
Involved in certain reflex responses and relay of information.

3. Hindbrain – पश्च मस्तिष्क
Includes the cerebellum, pons and medulla. It helps in balance, posture, involuntary activities and coordination.

3. Animated Diagram – Human Brain

Human Brain – Major Parts & Functions

Brain → Spinal Cord → Peripheral Nervous System → Effectors

4. Forebrain – अग्र मस्तिष्क

The forebrain is the major region associated with higher mental activities.

Important functions:

• Thinking and reasoning
• Memory and learning
• Interpretation of sensory information
• Decision-making
• Voluntary movements
• Emotions and conscious awareness

The cerebrum forms the largest part of the human brain.

5. Cerebrum – प्रमस्तिष्क

Cerebrum is the largest part of the human brain.

It is divided into two cerebral hemispheres and contains regions involved in sensory processing and voluntary motor control.

Functions:

• Thinking
• Reasoning
• Memory
• Intelligence
• Learning
• Language
• Interpretation of sensory information
• Control of voluntary actions

6. Midbrain – मध्य मस्तिष्क

The midbrain forms a relatively small region between the forebrain and hindbrain.

It participates in certain reflex responses involving visual and auditory stimuli and serves as a pathway for neural information.

Example: Reflex turning of the head in response to a sudden sound can involve midbrain pathways.

7. Hindbrain – पश्च मस्तिष्क

The hindbrain includes:

Cerebellum
Balance, posture and coordination

Pons
Relay functions and regulation of breathing

Medulla
Important involuntary activities

8. Cerebellum – अनुमस्तिष्क

The cerebellum is located at the back of the brain.

Functions:

• Maintains body balance.
• Maintains posture.
• Coordinates muscular activity.
• Helps in precision and smoothness of movements.

Examples: Walking, cycling, dancing and maintaining posture require proper coordination involving the cerebellum.

9. Pons – पॉन्स

The pons is a part of the hindbrain.

It acts as an important relay region between different parts of the nervous system and also contributes to the regulation of breathing.

10. Medulla Oblongata – मेडुला ऑब्लोंगेटा

The medulla is part of the hindbrain and is continuous with the spinal cord.

It controls or helps regulate several involuntary activities.

Examples:

• Breathing
• Heart rate regulation
• Blood pressure regulation
• Swallowing
• Coughing
• Sneezing

11. Brain and Voluntary / Involuntary Actions

Type	Meaning	Examples
Voluntary Action	Action performed under conscious control.	Writing, walking deliberately, picking up a book.
Involuntary Action	Action that occurs without conscious control.	Heartbeat, breathing regulation, digestion.
Reflex Action	Rapid automatic protective response.	Withdrawal of hand from hot object.

12. Brain Protection – मस्तिष्क की सुरक्षा

The brain is protected by several structures:

1. Skull: Hard bony structure surrounding the brain.
2. Meninges: Protective membranes around the brain.
3. Cerebrospinal Fluid (CSF): Provides cushioning and helps protect the brain and spinal cord.

13. Brain and Sensory Information

The brain receives information from sensory receptors through sensory neurons.

Different sensory receptors detect different stimuli:

Receptor	Stimulus
Photoreceptors	Light
Auditory receptors	Sound
Olfactory receptors	Smell
Gustatory receptors	Taste
Thermoreceptors	Temperature

The brain interprets these signals and helps generate appropriate responses.

14. Brain and Spinal Cord

Brain	Spinal Cord
Main control and processing centre.	Important pathway for nerve impulses.
Involved in conscious activities.	Coordinates many reflex actions.
Controls complex functions.	Carries signals between brain and body.
Protected mainly by skull.	Protected by vertebral column.

15. 30 MCQs – Multiple Choice Questions

Q1. Which is the main control centre of the human nervous system?

A) Brain

B) Kidney

C) Heart

D) Liver

Answer: A

Q2. Which is the largest part of the human brain?

A) Medulla

B) Cerebrum

C) Pons

D) Cerebellum

Answer: B

Q3. Which part mainly controls balance and posture?

A) Cerebrum

B) Medulla

C) Cerebellum

D) Spinal cord

Answer: C

Q4. Which part of the brain is associated with thinking and reasoning?

A) Cerebellum

B) Medulla

C) Pons

D) Cerebrum

Answer: D

Q5. Which part controls many involuntary activities?

A) Medulla

B) Cerebrum

C) Cerebellum

D) Retina

Answer: A

Q6. The hindbrain includes:

A) Cerebrum only

B) Cerebellum, pons and medulla

C) Cerebrum and spinal cord

D) Retina and medulla

Answer: B

Q7. Which structure is protected by the skull?

A) Brain

B) Kidney

C) Lungs

D) Stomach

Answer: A

Q8. Which part is involved in coordination of muscular movements?

A) Medulla

B) Pons

C) Cerebellum

D) Retina

Answer: C

Q9. Which part of the brain is associated with conscious thought?

A) Cerebrum

B) Medulla

C) Spinal cord

D) Pons

Answer: A

Q10. Which region lies between forebrain and hindbrain?

A) Cerebellum

B) Midbrain

C) Medulla

D) Spinal cord

Answer: B

Q11. Which structure connects the brain with the spinal cord?

A) Brain stem region

B) Cerebrum only

C) Retina

D) Cerebellum only

Answer: A

Q12. Which part is important for maintaining posture?

A) Cerebellum

B) Cerebrum

C) Retina

D) Kidney

Answer: A

Q13. Which part is associated with breathing regulation?

A) Cerebrum only

B) Pons and medulla

C) Cerebellum only

D) Retina

Answer: B

Q14. Meninges are:

A) Brain muscles

B) Protective membranes

C) Blood cells

D) Neurons only

Answer: B

Q15. Cerebrospinal fluid mainly provides:

A) Digestion

B) Cushioning and protection

C) Blood clotting

D) Muscle contraction

Answer: B

Q16. Which activity is voluntary?

A) Heartbeat

B) Digestion

C) Writing

D) Sneezing reflex

Answer: C

Q17. Which part is mainly responsible for intelligence and reasoning?

A) Cerebrum

B) Medulla

C) Pons

D) Cerebellum

Answer: A

Q18. Which brain part helps make movements smooth and coordinated?

A) Medulla

B) Cerebellum

C) Pons

D) Spinal cord

Answer: B

Q19. Sudden visual and auditory reflexes may involve:

A) Midbrain

B) Kidney

C) Cerebellum only

D) Liver

Answer: A

Q20. Which part is continuous with the spinal cord?

A) Medulla

B) Cerebrum

C) Cerebellum

D) Retina

Answer: A

Q21. Which part interprets sensory information at a conscious level?

A) Cerebrum

B) Medulla

C) Pons only

D) Spinal cord only

Answer: A

Q22. Which is NOT a function of cerebellum?

A) Balance

B) Posture

C) Coordination

D) Higher reasoning

Answer: D

Q23. Which structure protects the brain externally?

A) Skull

B) Ribs

C) Vertebrae only

D) Pelvis

Answer: A

Q24. The brain and spinal cord together form:

A) PNS

B) CNS

C) Endocrine system

D) Muscular system

Answer: B

Q25. Which part is associated with many involuntary activities such as swallowing and coughing?

A) Cerebrum

B) Cerebellum

C) Medulla

D) Retina

Answer: C

Q26. Which region contains the main centres responsible for higher mental functions?

A) Forebrain

B) Hindbrain only

C) Spinal cord

D) Medulla only

Answer: A

Q27. Which brain region helps coordinate visual and auditory reflexes?

A) Midbrain

B) Cerebellum

C) Medulla

D) Cerebrum only

Answer: A

Q28. A person has difficulty maintaining balance. Which part may be affected?

A) Cerebellum

B) Medulla

C) Pons

D) Retina

Answer: A

Q29. Which is an involuntary activity?

A) Writing

B) Reading

C) Heartbeat

D) Drawing

Answer: C

Q30. Which statement is correct?

A) Cerebellum controls reasoning.

B) Cerebrum is associated with higher mental functions.

C) Medulla controls voluntary writing.

D) Pons is the largest brain region.

Answer: B

16. 2 Marks Questions – 2 अंक

2 Marks Q1. What is the main function of the brain?

The brain receives and processes information and coordinates appropriate responses of the body.

2 Marks Q2. Name the three major regions of the human brain.

Forebrain, midbrain and hindbrain.

2 Marks Q3. Name the part of brain responsible for balance and posture.

Cerebellum.

2 Marks Q4. What is the function of medulla?

Medulla regulates several involuntary activities such as breathing, swallowing and heart-rate-related functions.

2 Marks Q5. What is the role of cerebrum?

Cerebrum is involved in thinking, reasoning, memory, sensory interpretation and voluntary actions.

17. 3 Marks Questions – 3 अंक

3 Marks Q6. Write three functions of cerebrum.

1. Thinking and reasoning.
2. Memory and learning.
3. Control of voluntary actions.

3 Marks Q7. Write three functions of cerebellum.

1. Maintains body balance.
2. Maintains posture.
3. Coordinates muscular movements.

3 Marks Q8. Differentiate between voluntary and involuntary actions.

Voluntary actions are consciously controlled, e.g. writing. Involuntary actions occur without conscious control, e.g. heartbeat and many digestive activities.

3 Marks Q9. What are the functions of the hindbrain?

The hindbrain helps in balance and coordination, regulation of breathing and control/regulation of several involuntary activities.

3 Marks Q10. How is the brain protected?

The brain is protected by the skull, meninges and cerebrospinal fluid, which provides cushioning.

18. 4 Marks Questions – 4 अंक

4 Marks Q11. Explain the functions of forebrain.

1. Thinking and reasoning.
2. Memory and learning.
3. Interpretation of sensory information.
4. Control of voluntary activities.

4 Marks Q12. Explain the functions of cerebellum.

The cerebellum maintains balance and posture and coordinates muscular movements. It helps make movements smooth, precise and properly coordinated.

4 Marks Q13. Explain the functions of medulla.

Medulla is involved in regulation of important involuntary activities such as breathing, swallowing, coughing and regulation of heart-related functions.

4 Marks Q14. Differentiate between cerebrum and cerebellum.

Cerebrum	Cerebellum
Largest part of brain.	Smaller hindbrain region.
Thinking, memory and reasoning.	Balance and coordination.
Controls voluntary actions.	Coordinates muscular movements.
Higher mental functions.	Posture and precision of movement.

4 Marks Q15. Explain the three major divisions of the brain.

Forebrain is associated with higher mental functions. Midbrain participates in certain visual and auditory reflexes and neural pathways. Hindbrain includes cerebellum, pons and medulla and is involved in coordination, balance, breathing and several involuntary activities.

19. 5 Marks Questions – 5 अंक

5 Marks Q16. Explain the structure and functions of the human brain.

The brain is the main control centre of the nervous system. It consists broadly of forebrain, midbrain and hindbrain. The forebrain, especially cerebrum, controls thinking, reasoning, memory and voluntary actions. The midbrain participates in certain visual and auditory reflexes. The hindbrain contains cerebellum, pons and medulla and helps in coordination, balance, breathing and involuntary activities.

5 Marks Q17. Explain the role of cerebrum in human behaviour.

Cerebrum is involved in thinking, intelligence, reasoning, memory, learning, language, conscious awareness, interpretation of sensory information and control of voluntary actions. Therefore, it plays a major role in complex human behaviour.

5 Marks Q18. Explain the role of cerebellum and medulla.

Cerebellum coordinates muscular activity and maintains balance and posture. Medulla is involved in important involuntary activities such as breathing, swallowing, coughing and regulation of heart-related functions.

5 Marks Q19. Explain how the brain and spinal cord work together.

The brain acts as the major control and processing centre, while the spinal cord provides a pathway for impulses between the brain and body. The spinal cord also coordinates many reflex actions. Together they form the central nervous system.

5 Marks Q20. Explain the protective structures of the brain.

The skull provides hard external protection. Meninges form protective membranes around the brain. Cerebrospinal fluid cushions the brain and helps protect it from mechanical shocks.

20. 6 Marks Questions – 6 अंक

6 Marks Q21. Describe the major parts of the human brain and their functions.

Answer:

1. Forebrain: Thinking, reasoning, memory, learning, sensory interpretation and voluntary actions.
2. Midbrain: Participates in certain visual and auditory reflexes and information pathways.
3. Cerebellum: Maintains balance, posture and coordination of movements.
4. Pons: Acts as a relay region and contributes to breathing regulation.
5. Medulla: Regulates several involuntary activities.
6. Spinal connection: Brain communicates with the body through pathways involving the spinal cord.

6 Marks Q22. Explain the functions of cerebrum, cerebellum and medulla.

Cerebrum: Thinking, reasoning, memory, learning, sensory interpretation and voluntary actions.

Cerebellum: Balance, posture and coordination of muscular movements.

Medulla: Regulation of important involuntary activities such as breathing, swallowing and coughing.

6 Marks Q23. Explain the difference between forebrain, midbrain and hindbrain.

Region	Main functions
Forebrain	Thinking, reasoning, memory, sensory interpretation and voluntary actions.
Midbrain	Certain visual and auditory reflexes and neural pathways.
Hindbrain	Balance, coordination, breathing and several involuntary activities.

6 Marks Q24. Explain why cerebellum is important for coordinated movement.

Cerebellum receives information related to body position and movement and helps coordinate muscular activity. It contributes to balance, posture and smooth, accurate movements. Activities such as walking, cycling and maintaining posture require proper cerebellar coordination.

6 Marks Q25. Explain the role of medulla in controlling involuntary activities.

The medulla is part of the hindbrain and is continuous with the spinal cord. It contains important centres involved in regulation of involuntary activities. These include breathing, swallowing, coughing and regulation of cardiovascular functions such as heart rate and blood pressure.

6 Marks Q26. Explain how the brain protects itself from injury.

1. Skull surrounds and protects the brain.
2. Meninges form protective coverings.
3. Cerebrospinal fluid provides cushioning.
4. These structures reduce mechanical impact.
5. The brain is located inside the strong cranium.
6. Together these protective mechanisms help safeguard delicate nervous tissue.

6 Marks Q27. Explain the relationship between sensory input and brain response.

Sensory receptors detect stimuli from the environment or body. Sensory neurons carry information towards the central nervous system. The brain processes and interprets the information and, when required, sends commands through motor pathways to muscles or glands. This produces an appropriate response.

6 Marks Q28. A person can think normally but has difficulty maintaining balance. Which part of the brain may be affected? Explain.

The cerebellum may be affected because it plays an important role in maintaining balance, posture and coordination of muscular movements. Normal thinking can still occur because higher mental functions are mainly associated with the cerebrum.

6 Marks Q29. Why are some activities of our body called involuntary? Give examples and name an important brain region involved.

Involuntary activities occur without conscious control. Examples include heartbeat regulation, breathing regulation, swallowing and coughing. The medulla of the hindbrain plays an important role in regulating several such activities.

6 Marks Q30. Explain the statement: “The brain is the control centre of the human body.”

The brain receives sensory information, processes it and coordinates appropriate responses. It controls conscious activities such as thinking, reasoning, memory and voluntary movement. It also participates in regulation of involuntary activities through regions such as the medulla. It communicates with the rest of the body through neural pathways, including the spinal cord. Therefore, it acts as the major control and coordination centre.

21. HOTS / Competency Based Questions

HOTS 1: A student can remember information but cannot maintain body balance properly. Which brain region should be suspected and why?

Answer: The cerebellum may be affected because it is important for balance, posture and coordination of muscular movements, whereas memory is mainly associated with the cerebrum.

HOTS 2: Why can a person continue to have a heartbeat even when he is not consciously thinking about it?

Answer: Heartbeat is an involuntary activity and its regulation involves autonomic nervous control, including centres in the medulla.

HOTS 3: If the cerebrum is functioning normally but the cerebellum is damaged, what type of difficulty may appear?

Answer: The person may have difficulty maintaining balance, posture and coordinated, precise movements.

22. CBSE Golden Points – परीक्षा के लिए महत्वपूर्ण

⭐ Point 1: Brain is the main control centre of the nervous system.

⭐ Point 2: Forebrain → thinking, reasoning, memory and voluntary actions.

⭐ Point 3: Cerebrum → largest part of brain.

⭐ Point 4: Cerebellum → balance, posture and coordination.

⭐ Point 5: Midbrain → certain visual and auditory reflexes.

⭐ Point 6: Pons → relay functions and contribution to breathing regulation.

⭐ Point 7: Medulla → important involuntary activities.

⭐ Point 8: Brain + Spinal Cord = Central Nervous System.

⭐ Point 9: Skull protects the brain.

⭐ Point 10: Meninges and cerebrospinal fluid provide additional protection.

23. Quick Revision Table

Brain Part	Key Function
Forebrain	Thinking, reasoning, memory, sensory interpretation and voluntary actions.
Cerebrum	Higher mental functions and conscious control.
Midbrain	Certain visual and auditory reflexes.
Hindbrain	Balance, coordination and involuntary functions.
Cerebellum	Balance, posture and muscular coordination.
Pons	Relay functions and breathing regulation.
Medulla	Important involuntary activities.
Spinal Cord	Signal pathway and coordination of many reflex actions.

24. Diagram Labelling Practice

For CBSE examination, practise labelling:

• Forebrain / Cerebrum
• Midbrain
• Hindbrain
• Cerebellum
• Pons
• Medulla
• Spinal cord

25. Super-Fast Revision

Cerebrum → Thinking & Voluntary Actions

Cerebellum → Balance + Posture + Coordination

Midbrain → Visual & Auditory Reflexes

Medulla → Involuntary Activities

Brain + Spinal Cord → Central Nervous System

Exam Tip: प्रश्न में यदि “thinking, reasoning, memory, intelligence” आए तो Cerebrum, यदि “balance, posture, coordination” आए तो Cerebellum, और यदि “involuntary activities, breathing, swallowing, coughing” आए तो Medulla याद रखें।